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/*
* Copyright (c) 2001, 2002, Eric M. Johnston <emj@postal.net>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Eric M. Johnston.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: jpeg.h,v 1.4 2002/10/15 02:57:09 ejohnst Exp $
*/
/*
* Functions for parsing a JPEG file, specific to EXIF use.
*
* Portions of this code were developed while referencing the public domain
* 'Jhead' program (version 1.2) by Matthias Wandel <mwandel@rim.net>.
*
*/
#ifndef _JPEG_H
#define _JPEG_H
/* The JPEG marker codes we're interested in. */
#define JPEG_M_BEG 0xff /* Start of marker. */
#define JPEG_M_SOF0 0xc0 /* Start of frame n... */
#define JPEG_M_SOF1 0xc1
#define JPEG_M_SOF2 0xc2
#define JPEG_M_SOF3 0xc3
#define JPEG_M_SOF5 0xc5
#define JPEG_M_SOF6 0xc6
#define JPEG_M_SOF7 0xc7
#define JPEG_M_SOF9 0xc9
#define JPEG_M_SOF10 0xca
#define JPEG_M_SOF11 0xcb
#define JPEG_M_SOF13 0xcd
#define JPEG_M_SOF14 0xce
#define JPEG_M_SOF15 0xcf
#define JPEG_M_SOI 0xd8 /* Start of image. */
#define JPEG_M_EOI 0xd9 /* End of image. */
#define JPEG_M_SOS 0xda /* Start of scan. */
#define JPEG_M_APP1 0xe1 /* APP1 marker. */
#define JPEG_M_APP2 0xe2 /* APP2 marker. */
#define JPEG_M_ERR 0x100
/* Our JPEG utility functions. */
extern int jpegscan(FILE *fp, int *mark, unsigned int *len, int first);
extern int jpeginfo(int *prcsn, int *cmpnts, unsigned int *height,
unsigned int *width, const char *prcss);
#endif
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